The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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AC-DC Converter for Electrolytic Capacitor-less LED Driver with Reduced LED Peak Current

LED 구동전류의 피크값이 저감된 전해 커패시터 없는 AC-DC 컨버터

  • Kang, Kyoung-Suk (Dept. of LED Convergence Eng., Pukyong National University) ;
  • Park, Gwon-Sik (Dept. of Electrical Eng., Pukyong National University) ;
  • Seo, Byung-Jun (Dept. of Electrical Eng., Pukyong National University) ;
  • Nho, Eui-Cheol (Dept. of Electrical Eng., Pukyong National University)
  • Received : 2017.12.28
  • Accepted : 2018.01.11
  • Published : 2018.02.20
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Abstract

A new single-stage flyback power converter with PFC for electrolytic capacitor-less LED driver is proposed in this study. This method minimizes the peak-to-average ratio of the LED driving pulsating current by adding the LED driving current near the LED current valley area, as well as the third harmonic component injection into the input current. The reduced peak current value of the LED drive current minimizes the thermal stress of the LED itself, thereby increasing the reliability of the LED, as well as achieving a long lifetime. Simulation and experimental results show the usefulness of the proposed topology.

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References

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